1.【动】脊索
2.高级脊椎动物胚胎期的脊索
1.a long flexible rod of cells that supports the body of chordates and vertebrate embryos and is in effect a primitive backbone
1.postflexion stage Developmental stage between the end of notochord flexion and the beginning of the juvenile stage.
后弯曲阶段介于脊索弯曲结束与稚鱼期开始之间的发育阶段。
2.The notochord is straight and caudal fin structures are beginning to form on the ventral side of the notochord .
此时脊索是直的，而且尾鳍的结构开始在脊索的腹侧边上形成。
3.When soft ossification undertakes, notochord cell is inside centrum ceaselessly shift arrives inside intervertebral disc organization.
当软骨化进行时，脊索细胞在椎体内不断地移位到椎间盘组织内。
4.Itself of notochord week scabbard still is in the center of centrum of cartilage source sex area, call mucous account.
脊索周鞘本身仍在软骨源性椎体的中心区，称为粘液状条。
5.As the notochord inside centrum close, notochord cell from centrum migratory to vertebra clearance.
随着椎体内脊索的闭合，脊索细胞从椎体迁移到椎间隙。
6.preflexion larva Developmental stage beginning at hatching and ending at the start of the upward flexion of the notochord .
前弯曲期幼体从孵化到脊索开始向上弯曲为止的发育阶段。
7.When notochord organization is ceaseless and migratory, fiber annulus also increases.
在脊索组织不断迁移时，纤维环亦增大。
8.Right now notochord cell disappears, pith nucleus becomes a fiber cartilage with soft and less cell gradually.
此时脊索细胞消失，髓核逐渐成为一个软而细胞较少的纤维软骨。
9.notochord length A straight line measurement from tip of snout to tip of notochord .
脊索长度从吻尖到脊索顶端的直线大小。
10.Comprise by notochord cell in area of intervertebral disc center.
在椎间盘中心区域由脊索细胞组成。